We know a lot about the climate

As part of a great piece debunking climate change denier strategy #2 “exaggerate the uncertainty” Dana Nuccitelli has a nice brief on the key facts that we do know about climate change (with supporting links):

First of all it’s important to note that while there will always be uncertainties associated with any area of scientific research, we have learned a lot about how the Earth’s climate functions. It’s important to sometimes take a step back and look at the big picture. We know that: